Modular Spray Cap Segmentation for Ergonomic Actuation
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Solution Overview
Problem
Traditional spray containers face challenges in providing an ergonomic and efficient mechanism for actuating the valve, particularly in terms of user comfort and ease of use, as well as manufacturing complexities in designing the nozzle and insert components.
Innovation Solution
A spray cap design featuring a body with a button, a downwardly projecting sleeve, and an insert within a forwardly-open compartment, where the button is depressable to shift the valve from a closed to an open condition, allowing for a more ergonomic actuation and easier manufacturing of separate nozzle and insert components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional spray nozzle design is used, then the valve actuation mechanism is simple, but the ergonomics and ease of use are poor
Solution Approach 1:
The spray cap is divided into distinct functional components: a button for actuation, a valve mechanism, and a nozzle assembly. This segmentation allows each component to be optimized independently - the button provides ergonomic actuation while the valve and nozzle handle dispensing functions, resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
The button serves as an intermediary element between the user's finger and the valve mechanism. Instead of directly actuating the valve, the user presses the button which then transmits force to open the valve, providing better ergonomics and finger leverage while keeping the overall mechanism relatively simple.
2Ease of manufacture
If the nozzle and insert are manufactured as integrated components, then manufacturing precision is maintained, but manufacturing complexity and difficulty increase
Solution Approach 1:
The nozzle assembly is segmented into separate components (nozzle body, insert, screen) that can be manufactured independently using different processes and then assembled. This allows each component to be optimized for its specific manufacturing requirements while maintaining overall assembly precision through proper design of mating surfaces and tolerances.
Solution Approach 2:
The insert and screen are nested within the nozzle body, with the insert fitting into the nozzle and the screen positioned within the insert. This nested arrangement allows compact packaging and simplifies the assembly process while maintaining precise relative positioning of the components.
3Adaptability or versatility
If a single-piece cap design is used, then device complexity is reduced, but adaptability and ease of manufacturing variations decrease
Solution Approach 1:
The cap is designed as an assembly of standardized components (cap body, button, valve, nozzle, insert, screen) where the nozzle and insert can be varied independently. This modular segmentation allows different nozzle and insert configurations to be produced by simply changing those specific components rather than redesigning the entire cap structure, providing adaptability without excessive complexity.
Solution Approach 2:
The cap body and button assembly are designed as universal components that can work with multiple variations of nozzles and inserts. This universality allows the same basic cap structure to support different product formulations, spray patterns, and performance characteristics by simply changing the nozzle and insert components.
Data Source
AI summary
A spray cap (20; 300; 400; 600) for a spray can (22) has a body comprising: a sidewall (140) having a lower portion for mounting to a body of the spray can; and a button (36). The button has: an upper surface (164) for user engagement; a downwardly projecting sleeve (38) for receiving an outlet stem (240) of the can; and a forwardly-open compartment (42). An insert (34; 302) is within the compartment. A nozzle member (32) is mounted across the compartment to contain the insert within the compartment.